<template>
  <header class='app-header'>
    <div class="container" v-show="y<78">
      <!--      Logo-->
      <h1 class="logo">
        <RouterLink to="/">小兔鲜</RouterLink>
      </h1>
      <!--      导航栏-->
      <AppHeaderNav/>
      <!--      搜索框-->
      <div class="search">
        <i class="iconfont icon-search"></i>
        <input type="text" placeholder="搜一搜">
      </div>
      <!-- 使用头部购物车组件-->
      <AppHeaderCart/>
    </div>
  </header>
</template>

<script>
import AppHeaderNav from '@/components/app-header-nav'
import { useWindowScroll } from '@vueuse/core'
import AppHeaderCart from '@/components/app-header-cart'

export default {
  name: 'AppHeader',
  components: { AppHeaderCart, AppHeaderNav },
  setup () {
    const { y } = useWindowScroll()
    // 提供y给模板
    return { y }
  }
}
</script>

<style scoped lang='less'>
.app-header {
  background: #fff;

  .container {
    display: flex;
    align-items: center;
  }

  .logo {
    width: 200px;

    a {
      display: block;
      height: 132px;
      width: 100%;
      text-indent: -9999px;
      background: url(../assets/images/logo.png) no-repeat center 18px / contain;
    }
  }

  .search {
    width: 170px;
    height: 32px;
    position: relative;
    border-bottom: 1px solid #e7e7e7;
    line-height: 32px;

    .icon-search {
      font-size: 18px;
      margin-left: 5px;
    }

    input {
      width: 140px;
      padding-left: 5px;
      color: #666;
    }
  }

  .cart {
    width: 50px;

    .curr {
      height: 32px;
      line-height: 32px;
      text-align: center;
      position: relative;
      display: block;

      .icon-cart {
        font-size: 22px;
      }

      em {
        font-style: normal;
        position: absolute;
        right: 0;
        top: 0;
        padding: 1px 6px;
        line-height: 1;
        background: @helpColor;
        color: #fff;
        font-size: 12px;
        border-radius: 10px;
        font-family: Arial;
      }
    }
  }
}
</style>
